Arlberg Arch, Stone County, Arkansas
Photo by Jay Wilbur
NABSQNO 15S-556701-3957575. Arlberg Arch is an adult cave natural arch eroded through sandstone of the Hale Formation. It is located in southwest Stone County, Arkansas. The arch is on private property and permission of the owner must be obtained before visiting it. It has a span of about 60 feet and a height of about 30 feet.